8 oz PAG 100 oil with UV dye for R134a A/C systems. Lubricates and detects leaks under UV light. Protects compressors. Ideal for auto repair & HVAC.

PAG 100 oil with UV dye for R-134a A/C systems — the standard viscosity grade for most domestic R-134a automotive compressors, with fluorescent dye built in for leak detection. The most common PAG-with-UV bottle you'll need on a service truck servicing American vehicles.

HCPRO Performance PAG 100 UV is an 8 oz / 237 mL standard-viscosity PAG compressor lubricant + UV leak detection dye. ISO VG 100 / ~98 SUS, polyalkylene glycol base, dye meets SAE J2297 leak-detection standards. For R-134a A/C systems specifying PAG 100 — most domestic vehicles (GM, Ford, Chrysler) and many imports. NOT for R-1234yf, hybrid, or EV compressors.

Who this oil is for

Auto A/C techs servicing domestic vehicles where OEM specifies PAG 100 (most common viscosity grade). Mobile mechanics, fleet service, independent repair shops. The go-to bottle for the majority of R-134a service work.

When to use it

During R-134a recharge when the OEM calls for PAG 100 AND you want leak detection in one step. Diagnostic top-off: 1–2 oz per circuit. Full compressor replacement: 4–8 oz per OEM spec. Inspect with UV-A light (365–400 nm) — leaks glow fluorescent green-yellow at the leak point.

Why PAG 100 UV vs Universal UV or PAG 46/150 UV

PAG 100 is the most-specified viscosity grade across domestic R-134a vehicles — running PAG 46 in a PAG 100 system reduces film strength under load; running PAG 150 increases drag and reduces cooling efficiency. When the OEM calls for 100, use 100. Universal UV blend is the safe choice when system viscosity is unknown.

Single 8 oz bottle, moisture-sealed. Manufactured in the USA to OEM compressor lubricant performance standards.

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